Fitzgerald sustained a concussion attempting to recover an onside kick in the fourth quarter, ESPN's Adam Schefter reported. Ellington was dealing with a thigh bruise.

Fitzgerald also was evaluated for a concussion last October and suffered one late in the 2010 season. He will have to go through league-mandated protocol to suit up for Week 16 at the Seattle Seahawks.

5. Bills defensive end Marcel Dareus never returned after coming down with an ankle injury of his own. On a torrid stretch the past couple of months, Dareus joined Kyle Williams to collapse the pocket on Chad Henne in Sunday's victory.

6. After missing three weeks with a left calf strain, Steelers pass rusher LaMarr Woodley was forced out of Sunday night's game with a right calf injury. He's doubtful to return.

7. Bengals linebacker James Harrison is doubtful to return to the same game after showing concussion symptoms. Punter Kevin Huber was knocked out with a fractured jaw, forcing kicker Mike Nugent to expand his duties.